diff --git a/Gemfile.lock b/Gemfile.lock
index 5ed8f7f44..7db21ae33 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -298,7 +298,7 @@ GEM
     multi_json (1.15.0)
     multi_xml (0.6.0)
     nenv (0.3.0)
-    net-imap (0.5.5)
+    net-imap (0.5.6)
       date
       net-protocol
     net-pop (0.1.2)